which trucking fleets?? I work for one and have heard no such thing, I hope they'd tell me since I repair the tractors lol

Well I haven't researched them but FedEx being one. I know we're getting off topic here so research CLNE and you'll see their investment in NG highway fueling stations built and 2013 stations plan. GE is developing at home fueling stations for LNG as well. It's on the way, now I'm not sure about it working well in high performance.

As for same energy, one trucker mentioned conversion to LNG from gas and said he's lost no power and pays around $1.40 a gallon. Caterpillar is working on development of NG engines and I believe Westport?